diff --git a/org.eclipse.lsp4e/src/org/eclipse/lsp4e/operations/hover/FocusableBrowserInformationControl.java b/org.eclipse.lsp4e/src/org/eclipse/lsp4e/operations/hover/FocusableBrowserInformationControl.java
index 50c2b767e..bf6e43a84 100644
--- a/org.eclipse.lsp4e/src/org/eclipse/lsp4e/operations/hover/FocusableBrowserInformationControl.java
+++ b/org.eclipse.lsp4e/src/org/eclipse/lsp4e/operations/hover/FocusableBrowserInformationControl.java
@@ -102,7 +102,7 @@ private void updateBrowserSize(final Browser browser) {
 		Point hint = computeSizeHint();
 		setSize(hint.x, hint.y);
 
-		if (!"complete".equals(safeEvaluate(browser, "return document.readyState"))) { //$NON-NLS-1$ //$NON-NLS-2$
+		if (!"complete".equals(safeEvaluate(browser, "return document.documentElement ? document.readyState : 'no content';"))) { //$NON-NLS-1$ //$NON-NLS-2$
 			UI.getDisplay().timerExec(200, () -> updateBrowserSize(browser));
 			return;
 		}